Hacker News Reader

Couldn’t you just do a breadth first flood fill from the player every time the environment changes? Would be O(n) where n is total number of cells, which would be fast on any hardware or in the browser.

You’d still want to use the directional chart idea.

View on HN

Or when player moves. But this is also something that came to my mind. They acknowledge this in a footnote:

[3] The approach I ended up using is very similar to a Dijkstra map, a pathfinding tool from roguelike games, which I discovered as I was writing this. As far as I could tell, my approach extends a Dijkstra map to handle minimal updates as the target moves and obstacles update

Reply on news.ycombinator.com